100 80
60
Number of Bacteria
40
20
х
0
10 20
Time (hours)
Based on the graph, approximately how many bacteria are present after 16
hours?
Use only numbers. Do NOT add units.

Match the correct terms to their descriptions a system in which only energy but not matter is exchanged frozen water in snow part of geosphere that includes only soil a thin layer between the troposphere and the stratosphere cryosphere tropopause closed system pedosphere